html, body {
    height: 100%;
    width: 100%;
}

* {
    padding: 0;
    margin: 0;
}

div.tab {
    background-color: antiquewhite;
    height: 300px;
    width: 80%;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

div.tab ul {
    list-style: none;
}

div.tab_list {
    height: 40px;
    background-color: rgb(194, 194, 194);
}

div.tab_list li {
    float: left;
    height: 40px;
    line-height: 40px;
    padding: 0 20px;
    cursor: pointer;
}

div.tab_list li:hover {
    background-color: rgb(144, 144, 144);
}

li.current {
    background-color: rgb(251, 139, 64);
    color: white;
}